. "stable"@en . . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Duckmantian Substage (Carboniferous Period) (318-314.75 Ma BP)."@en . . "Clackmannan Jewel Coal"@en . "Coal."@en . . "314.75"^^ . . . . . "318.0"^^ . "CLJC"@en . "Clackmannan Jewel Coal"@en .